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| <div class="innerhero__pre pb-3">Apache Ignite</div> |
| <h1 class="h1 innerhero__h1">Service APIs</h1> |
| <div class="innerhero__descr pt-2 h5"> |
| Deploy your microservices straight on the cluster nodes and<br /> |
| trigger execution from the application code |
| </div> |
| <div class="innerhero__action"><a class="button innerhero__button" href="https://ignite.apache.org/docs/latest/index">Start Coding</a></div> |
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| <!-- /.innerhero--> |
| <section class="service1"> |
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| <h2 class="service1__h2">Apache Ignite Service APIs Overview</h2> |
| <div class="fz20 service1__text"> |
| With the services API, you can create and deploy arbitrary services on the cluster. For instance, you may want to implement custom counters, hierarchical maps, or anything that you treat as a microservice. |
| </div> |
| </div> |
| </section> |
| <!-- /.service1--> |
| <section class="nativecode container jsTabWrap"> |
| <header class="blockheader blockheader--spl flexi"> |
| <h2 class="h4 blockheader__left">Use Contemporary Powerful Languages</h2> |
| <div class="blockheader__right service-subtextvideo fz20"><p>Create scalable microservices in languages such as Java or C#</p></div> |
| </header> |
| <div class="nativecode__tabctrls flexi"><a class="nativecode__link active" href="#" data-tablink="nativeTabJava">Java</a></div> |
| <div class="nativecode__tabs"> |
| <div class="nativecode__tab active" data-tab="nativeTabJava"> |
| <pre class="nativecode__codebox"> <code class="java">Ignite ignite = Ignition.start(); |
| |
| //get the services interface associated with all server nodes |
| IgniteServices services = ignite.services(); |
| |
| //start a node singleton |
| services.deployClusterSingleton("myCounterService", new MyCounterServiceImpl()); |
| </code></pre> |
| </div> |
| </div> |
| </section> |
| <!-- /.nativecode--> |
| <section class="service2"> |
| <div class="container"> |
| <h2 class="service2__h2 h4">Services Deployment Modes</h2> |
| <div class="service2__text">Deploy single or many instances of a service on the cluster</div> |
| <div class="service2__block"> |
| <div class="service2item service2item__one flexi"> |
| <div class="service2item__info"> |
| <h3 class="service2item__title">Cluster Singleton</h3> |
| <p class="service2item__text">The most commonly used feature is to deploy singleton services on the cluster.</p> |
| <p class="service2item__text"> |
| There is only one instance of the service in the cluster, and Ignite guarantees<br /> |
| that the instance is always available. |
| </p> |
| <p class="service2item__text">In case the cluster node on which the service is deployed disconnects, Ignite automatically redeploys the instance to another node.</p> |
| </div> |
| <img class="service2item__image1" src="/img/features/service/one-image.svg" alt="one-image" /> |
| </div> |
| <div class="service2item service2item__two flexi"> |
| <img class="service2item__image2" src="/img/features/service/two-image.svg" alt="two-image" /> |
| <div class="service2item__info service2item__info2"> |
| <h3 class="service2item__title">Node Singleton</h3> |
| <p class="service2item__text"> |
| You can specify your service as part of the node configuration and start<br /> |
| the service together with the node. |
| </p> |
| <p class="service2item__text"> |
| The service is started on each node of the cluster. If the service is a cluster singleton, it is started in the first cluster node, and is redeployed to one <br />of the other nodes if the first node terminates. |
| </p> |
| </div> |
| </div> |
| </div> |
| </div> |
| </section> |
| <section class="compute2"> |
| <div class="container"> |
| <h2 class="compute2__h2">Benefits Of Apache Ignite Service APIs</h2> |
| <div class="compute2__grid"> |
| <div class="compute2item"> |
| <div class="compute2-points__item fz20"></div> |
| <div class="compute2item__block"> |
| <h3 class="fz20 compute2item__title">Load balancing</h3> |
| <p class="compute2__text">In all cases, other than singleton service deployment, Ignite makes sure that an equal number of services are deployed on each node within the cluster.</p> |
| <p class="compute2__text">Whenever cluster topology changes, Ignite will re-evaluate service deployments and may re-deploy an already deployed service on another node for better load balancing.</p> |
| </div> |
| </div> |
| <div class="compute2item"> |
| <div class="compute2-points__item fz20"></div> |
| <div class="compute2item__block"> |
| <h3 class="fz20 compute2item__title">Fault Tolerance</h3> |
| <p class="compute2__text">Ignite always guarantees that services are continuously available, and are deployed according to the specified configuration, regardless of any topology changes or node crashes.</p> |
| </div> |
| </div> |
| <div class="compute2item"> |
| <div class="compute2-points__item fz20"></div> |
| <div class="compute2item__block"> |
| <h3 class="fz20 compute2item__title">Hot Redeployment</h3> |
| <p class="compute2__text">You can update the implementation of a service without stopping the cluster.</p> |
| <p class="compute2__text">Use Ignite’s DeploymentSpi configuration to re-deploy services without restarting the cluster.</p> |
| </div> |
| </div> |
| </div> |
| </div> |
| </section> |
| <!-- /.compute2--> |
| <section class="native-bottom container"> |
| <div class="native-bottom__grid"> |
| <article class="nativebotblock"> |
| <div class="h4 nativebotblock__title"><img class="nativebotblock__icon" src="/img/features/native-rocket.svg" alt="" /><span>Ready to Start?</span></div> |
| <p class="nativebotblock__text">Start coding with Ignite Service APIs</p> |
| <a class="nativebotblock__link arrowlink" href="https://ignite.apache.org/docs/latest/services/services#re-deploying-services" target="_blank">Performing Service APIs </a> |
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